This project will improve the storm drain system near Avenue A in the Hyde Park neighborhood and reduce the risk of flooding. General project boundaries are Avenue D, W. 33rd St., Guadalupe St. and W. 47th St.


The type of flooding that is occurring in the project area is known as local flooding. It generally occurs away from creeks in areas where the manmade drainage system of pipes and ditches is overwhelmed by heavy rainfall. In this case, when the neighborhood was developed, we suspect that an entire creek or small tributary was diverted into the storm drain system and roads and possibly structures were built where the water once flowed.

Project Map

The map below is turned on its side with north towards the left. It shows the proposed solution. Click on the map to download a larger PDF.

Map showing the project area, proposed storm drain pipes, proposed detention ponds and other aspects of the project.

Proposed Solution

With the proposed solution, we estimate that 178 structures would no longer flood during a 100-year storm (10.2 inches of rain in 24-hours). It includes the following:

  • Upgrading 20,000 feet of storm drain pipes
  • Optimizing the outfall of the Triangle Pond and its two main headwalls
  • Adding debris blockers at the Triangle Pond outfall
  • Widening the channel of Hemphill Branch (the creek) at the outfall
  • Acquiring easements along an existing pipe
  • Relocating underground utilities as needed.

To prevent worsening flooding along Hemphill Branch, the proposal also includes the following:

  • Adding a detention pond in the field next to the Baker Center
  • Adding a detention pond in a grassy area of Adams Hemphill Park
  • Relocating a gas line near E 26th Street
  • Possibly replacing the culverts at 32nd and Wheeler Streets.

Timeline and Cost

Our capital improvement projects take many years from start to finish. The process typically includes the following phases:

  • Preliminary Engineering – when a solution is identified and costs are estimated.
  • Design – when the details are worked out and construction plans drawn up.
  • Bidding and Permitting – when a contractor is hired and all permits are acquired.
  • Construction – when the project is built.

The project is currently in the design phase with construction anticipated to begin in 2024. The estimated cost is $39.2 million.


Email Updates

Email Stephanie Lott to receive email updates about public meetings or the completion of the study.